（1 天津大学建筑工程学院， 天津 300072； 2 东南大学土木工程学院， 南京 210096）

［摘要］钢筋混凝土空腹网架楼盖和空腹夹层板楼盖是基于大跨度楼盖需要产生的新型楼盖形式。详细介绍了几种大跨度钢筋混凝土楼盖的构造特点，推导了考虑剪切变形的钢筋混凝土空腹网架楼盖和空腹夹层板楼盖的等效剪切刚度。以25m×25m大跨度楼盖工程为例，利用ANSYS和PKPM软件对钢筋混凝土密肋井字梁楼盖、空腹网架楼盖和空腹夹层板楼盖的力学性能和经济指标进行了对比分析。结果表明：三种形式的楼盖在均布荷载10kN/m2作用下的挠度均能满足《混凝土结构设计规范》（GB 50010—2010）要求，其中钢筋混凝土空腹网架楼盖和空腹夹层板楼盖经济性能更好，具有明显的优势。

［关键词］密肋井字梁楼盖; 空腹网架楼盖; 空腹夹层板楼盖; 力学性能; 经济性

中图分类号：TU375      文献标识码：A      文章编号：1002-848X(2014)17-0040-06

Mechanical properties and economy analysis of large-span reinforced concrete floors

Luan Huanqiang1, Chen Zhipeng2, Chen Zhihua1

 (1 School of Civil Engineering, Tianjin University, Tianjin 300072, China; 2 School of Civil Engineering, Southeast University, Nanjing 210096, China)

Abstract: Based on the need of large-span reinforced concrete floors, the reinforced concrete open-web grid floor and open-web sandwich plate floor were produced.Construction characteristics about several large-span reinforced concrete floors were introduced，and the equivalent shear stiffness formulas considering shear deformation of the open-web grid floor and the open-web sandwich plate floor were derived. Take the large-span floor (25m×25m) for example, the mechanical properties and economic indexes of the reinforced concrete density rib well-character floor, open-web grid floor and open-web sandwich plate floor were compared and analyzed by the software ANSYS and PKPM. The results show that the deflection of the three floors can well meet the requirements of Code for design of concrete structures (GB 50010—2010) under uniform load of 10kN/m2, the reinforced concrete open-web grid floor and open-web sandwich plate floor are more economic and have obvious advantages.

Keywords: density rib well-character floor; open-web grid floor; open-web sandwich plate floor; mechanical properties; economy

通讯作者：陈志华，博士，教授，Email：zhchen@tju.edu.cn。

参考文献

［1］王春华，王国庆，朱忠义.首都国际机场T3号航站楼结构设计[J].建筑结构，2008,38（1）：16-24.

[2]李培林，吴学敏.混凝土密肋及井式楼盖设计手册[M].北京:中国建筑工业出版社，1994.

[3]徐金声，薛丽红.现代预应力混凝土楼盖结构[M].北京:中国建筑工业出版社，1998.

[4]马克俭，韦明辉，李彬，等.装配整体式钢筋混凝土空腹网架结构的设计与研究[J].贵州工学院学报，1987,27（1）:1-17.

[5]黄勇，马克俭，张华刚，等.钢筋混凝土空腹夹层板楼盖体系的研究与应用\[J\].建筑结构学报,1997,18（6）:55-64.

[6]马克俭，张华刚，郑涛.新型建筑空间网格结构理论与实践[M].北京:人民交通出版社,2006.

[7]刘群，杨进春.大跨度空间密肋楼盖设计计算的拟板解法[J].建筑科学,1997,12（6）:30-34.

[8]吴连元.板壳理论[M].上海:上海交通大学出版社,1989.

[9]王新敏.ANSYS工程结构数值分析[M].北京:人民交通出版社,2007.